.banner_div .banner_img ul li img {
  width: 100%;
  height: 3.5rem;
}
.banner_div .hd {
  position: absolute;
  width: 6rem;
  height: 0.1rem;
  border-radius: 0.1rem;
  margin-left: 0.2rem;
  margin-top: -0.15rem;
}
.banner_div .hd ul li {
  display: inline-block;
  width: 24%;
  height: 0.1rem;
  background-color: #ffffff;
  opacity: 0.5;
}
.banner_div .hd ul li:first-child {
  border-top-left-radius: 0.1rem;
  border-bottom-left-radius: 0.1rem;
}
.banner_div .hd ul li:last-child {
  border-top-right-radius: 0.1rem;
  border-bottom-right-radius: 0.1rem;
}
.banner_div .hd ul .on {
  background-color: #009bdf;
  opacity: 1;
}